Tightening crank bolt

So I decided to do things on my own but do not have a torque wrench. In any case, when the bottom bracket was installed, I used as much force as I could (as per a youtube video I saw). On the (square taper) crank bolt, I didn't want to strip it so I used just enough force. I thought it was enough but one day one side started wobbling. So I tightened it again and it stayed for a while until it started creaking. I put a reasonable amount of force this time (I think).
Now, the question. Will this continue to occur after this happens once and do I have to ask a shop to use Locktite?